US2883907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stereoscope
Assignee: Actron Industries Inc
•
Filing: 1954-10-11
•
Granted: 1959-04-28
•
Expires: 1974-10-11
Abstract
No abstract record available.
Inventors
- 👤 Harold C Silent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:37
CPC Classifications
G; G02; G02B; G02B30/00; G02B30/20; G02B30/34; G02B30/35
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1865683A
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US2313562A
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US2520432A
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US2693128A
Cited
DE814797C
Cited
US2694339A
Cited
US2666360A
Cited
US2781691A
Cited
US2834251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |